Figure 5 .

Volcano plot depicting differentially expressed homeologous gene copies obtained using P. fastigiatum full-lengths ESTs as a reference for tag mapping. With gene loci for which gene expression of individual homeologous copies could be studied we identified 245 genes up-regulated in P. enysii and 136 genes up-regulated in P. fastigiatum. 392 such loci were not differentially expressed between species (black cross). Among the up-regulated genes, six different patterns were detected. In 111 cases all copies of one locus were up-regulated in P. enysii (dark blue stars); in 38 cases both copies were up-regulated in P. fastigiatum (light blue stars); for 101 and 65 sequences, one copy was up-regulated in P. enysii (yellow circles) and P. fastigiatum (orange circles), respectively, whereas the other copy was not differentially expressed and in 66 cases one copy was up-regulated in one species while the other was up-regulated in the other (red triangles). Log fold ratios >30 and <β€‰βˆ’30 indicate genes with zero tags in either of both species whereas log fold ratios between βˆ’10 and 10 indicate genes with tags present in both species but differing in abundance.

Voelckel et al. BMC Genomics 2012 13:322   doi:10.1186/1471-2164-13-322
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